/Engine/Source/Runtime/CoreUObject/Public/UObject/PackageTrailer.h
Try to load a trailer from a given package path. Note that it will always try to load the trailer from the workspace domain
static bool TryLoadFromPackage ( const [FPackagePath](API\Runtime\CoreUObject\Misc\FPackagePath) & PackagePath, [FPackageTrailer](API\Runtime\CoreUObject\UObject\FPackageTrailer) & OutTrailer )